Late to the party here, but just some stuff I ran into in the past. I went with a cheaper 4 row aluminum radiator that came with cheap fans. Installed it into my Cutlass with an Olds big block and never could get it to cool. swapped the fans with Spahl fans and it improved but wasnt great. When the big block took a crap on me due to not being thoroughly cleaned by the engine builder, I ended up LS swapping the car and also changing to a Champion dual row with 1" tubes and I have had zero overheating issues with the new rad and the spahl fans with a shroud. may not work for everyone, but it worked out great in the end for me.